DAGA (Digital Asset Growth Agent) aims to establish a distributed future credit system, which is the foundation of financial and commercial operations. The DAGA protocol will combine and innovate based on the advantages of some blockchain technologies, and propose solutions for commercial lending, fundraising, investment, fund management, and fund exit. The DAGA protocol completes the technical connection and value exchange of different blockchains in a distributed manner. In this connection process, it is necessary to establish a universal cross chain asset exchange protocol, cross chain transactions, and a distributed accounting system for intra chain transactions. The DAGA protocol needs to be able to support public, private, and alliance chains. In a broad sense, the assets on the chain can be used as the basis for credit establishment. DAGA protocol can also reward the addresses on the chain according to the execution results of asset transactions. The number of tokens held by DAGA in the end represents the credit evaluation criteria in cross chain asset value-added service....